djo7613@blake.acs.washington.edu (Dick O'Connor) (08/12/89)
The unthinkable just got thought, apparently, and our office was just hit by a severe electrical spike and following brownout while my Z100 was just finishing up a file transfer. Power's now back on, and she seems to be running fine except for some video problems. A video jitter now snakes its way up the screen starting from the bottom, line by line. I'm using a composite monochrome monitor (an old ZVM-122); replacing it with a ZVM-122 from a working machine exhibits the same symptoms. I'm guessing something on the video board got lightly toasted (not exactly fried, since I can read well enough to POST!) when the surge hit. I plan to swap the board with one from a working model and test it out. Do any of you who've survived similar problems have any advice to offer? I'd be most interested in knowing how to tell what might have been damaged, incase a quick and easy fix to the board is possible. Thanks ffrroomm someone whose eyes are going crosseyed... "Moby" Dick O'Connor ** DISCLAIMER: It would Washington Department of Fisheries ** surprise me if the Olympia, Washington 98504 ** rest of the Department Internet Mail: djo7613@blake.acs.washington.edu ** agreed with any of this! P.S. New style motherboard, 8 MHz, 768K RAM, all floppy drives (no hard disk), nothing fancy on this baby!
GUBBINS@TOPS20.RADC.AF.MIL (Gern) (08/14/89)
let me know what happens when you swap video boards. Usually, I thought, symptoms like that are in the monitor especially an external monitor with it's own power (which would be my first suspect). If it is the video board, it will be cheap to fix it. Gern -------